GEBCO Global Bathymetry and Topography Including Basal Ice Surface

<p>The Nippon Foundation-GEBCO <a href='https://seabed2030.org/' target='_blank'>Seabed 2030 project</a> has produced a global terrain model for ocean and land. The GEBCO_2023 grid was published in April 2023 and is the fifth GEBCO grid developed through The Nippon Foundation-GEBCO Seabed 2030 Project. This is a collaborative project between the <a href='https://www.nippon-foundation.or.jp/en/' target='_blank'>Nippon Foundation</a> of Japan and <a href='https://www.gebco.net/' target='_blank'>GEBCO</a>. The Seabed 2030 Project aims to bring together all available bathymetric data to produce the definitive map of the world ocean floor and make it available to all.</p> <p>The GEBCO_2023 Grid is a continuous, global terrain model for ocean and land with a spatial resolution of 15 arc seconds. Between latitudes of 50° South and 60° North it uses version 2.5.5 of the SRTM15+ dataset as a \"base\". This data set is a fusion of land topography with measured and estimated seafloor topography. This version of SRTM15+ is similar to version 2.1 [Tozer et al., 2019] but includes additional data sets. It uses predicted depths based on the V32 gravity model [Sandwell et al., 2019]. The SRTM15+ base grid has been augmented with the gridded bathymetric data sets developed by the four Seabed 2030 Regional Centers to produce the GEBCO_2023 Grid. <b>Note:</b> SRTM15+ V2.5.5 is also available through OpenTopography <a href='https://doi.org/10.5069/G92R3PT9' target='_blank'>here.</a></p> <p>The information for ice-surface elevation and under-ice topography/bathymetry is taken from IceBridge BedMachine Greenland, Version 4.6 (Morlighem, M. et al. 2017) and data based on MEaSUREs BedMachine Antarctica, Version 2 (Morlighem, M. et al 2020). </p><p><b>NOTE:</b> This dataset includes under-ice sheet topography. For a version of the dataset with ice surface topography see \"GEBCO IceTopo\" below under \"Other Available Data Products\".</p>

<p>由日本公益财团法人日本船舶振兴会（Nippon Foundation）与国际海洋测深图委员会（GEBCO）联合发起的<a href='https://seabed2030.org/' target='_blank'>海底2030项目（Seabed 2030 project）</a>，已完成一套全球海陆地形模型的构建。其中发布于2023年4月的GEBCO_2023格网，是该项目推出的第五代GEBCO格网产品。本项目为<a href='https://www.nippon-foundation.or.jp/en/' target='_blank'>日本公益财团法人日本船舶振兴会（Nippon Foundation）</a>与<a href='https://www.gebco.net/' target='_blank'>国际海洋测深图委员会（GEBCO）</a>的合作项目，其核心目标是整合全球所有可用的水深测量数据，编制权威的世界洋底地图并向全人类开放共享。</p><p>GEBCO_2023格网是一套连续的全球海陆地形模型，空间分辨率为15角秒。在南纬50°至北纬60°区间内，该模型以SRTM15+数据集的2.5.5版本作为“基础框架”。该数据集融合了陆地地形数据与实测及估算的海底地形数据。此版本的SRTM15+与2019年发布的2.1版本[Tozer等，2019]大体一致，但新增了多套数据集，同时采用了基于V32重力模型的预测水深数据[Sandwell等，2019]。GEBCO_2023格网是在SRTM15+基础格网的基础上，叠加了海底2030项目四个区域中心研发的格网化水深数据集后生成的。<b>注：</b> SRTM15+ V2.5.5也可通过OpenTopography平台获取，详情请点击<a href='https://doi.org/10.5069/G92R3PT9' target='_blank'>此处</a>。</p><p>冰面高程及冰下地形/水深数据源自IceBridge BedMachine格陵兰版4.6版本（Morlighem等，2017）以及基于MEaSUREs BedMachine南极洲版2版本（Morlighem等，2020）的相关数据。</p><p><b>注意：</b> 本数据集包含冰盖下地形数据。如需获取仅包含冰面地形的数据集版本，请参阅下文“其他可用数据产品”板块中的“GEBCO IceTopo”。</p>